com.openinventor.inventor.projection

Class SbSphericalProjection

java.lang.Object

com.openinventor.inventor.Inventor

com.openinventor.inventor.projection.SbProjection

com.openinventor.inventor.projection.SbSphericalProjection

public class SbSphericalProjection
extends SbProjection

Spherical coordinate projection. This class performs a spherical coordinate projection and is normally used with an SoProjection or SoGeoProjection node.

Spherical coordinates can be represented using the usual coordinate classes (SbVec3f, SoMFVec3f, etc) but the three values are considered to be

• Longitude: an angle measured in degrees in the interval [-180,180]
• Latitude: an angle measured in degrees in the interval [-90,90]
• Altitude (or radius): a distance in 3D units greater than zero

The parameters are :

Name	Type	Index	Default
radius	float	0	0
scaleRatio	float	1	1

The radius parameter is an offset added to each altitude value before projection. This is useful when the altitude values are, for example, relative to sea level.

The scaleRatio parameter is a multiplicative ratio applied to altitude values before projection. This is useful to exaggerate altitudes for visualization purposes.

The spherical projection of a point P(lon,lat,alt) is computed as follows:

 newLon = lon * degreeToRadians
 newLat = lat * degreeToRadians
 newRadius = radius + alt * scaleRatio
 
 x = newRadius*cos(newlat)*cos(newlon)
 y = newRadius*cos(newlat)*sin(newlon)
 z = newRadius*sin(newlat)

See also:

SbProjection, SoProjection

Nested Class Summary

Nested classes/interfaces inherited from class com.openinventor.inventor.Inventor

Inventor.ConstructorCommand

Field Summary

Fields inherited from class com.openinventor.inventor.Inventor

VERBOSE_LEVEL, ZeroHandle

Constructor Summary

Constructors

Constructor and Description
SbSphericalProjection() Constructor.
SbSphericalProjection(SoProjection node) Constructor.

Method Summary

Methods inherited from class com.openinventor.inventor.projection.SbProjection

exit, getFloatParameter, getNumFloatParameters, getNumStringParameters, getProjectedBoundingBox, getProjectionNode, getStringParameter, init, inverse, project, setNumFloatParameters, setNumStringParameters, setParameter, setParameter

Methods inherited from class com.openinventor.inventor.Inventor

dispose, getAddress, getNativeResourceHandle, startInternalThreads, stopInternalThreads

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SbSphericalProjection

public SbSphericalProjection(SoProjection node)

Constructor.

SbSphericalProjection

public SbSphericalProjection()

Constructor.